Car-bolster.



PATENTED NOV. 29, 1904.

J. GREEN.

OAR BOLSTER.

APPLICATION rum) MAR. 24, 1904.

N0 MODEL.

v ndffi Ill UNITED STATES PATENT Patented November 29, 1904:.

EEIcE.

JOHN GREEN, OF ST. LOUIS, MISSOURI, ASSIGNOR TO OOMMONIVEALTH STEELCOMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION.

CAR-BOLSTER.

SPECIFICATION forming part of Letters Patent No. 776,234, dated November29, 1904.

Application filed March 24, 1904. Serial N- 199,'765. (No model) To allwhom it may concern:

Be it known that I, JOHN GREEN, a citizen of the United States, residingin the city of St. Louis, State of Missouri, have invented certain newand useful Improvements in Car- Bolsters, of which the following is afull,clear, and exact description, reference being had to theaccompanying drawings, forming part of this specification.

to My inventionrelates to an improvement in car-bolsters that isapplicable to either a truckbolster or a body-bolster, the object of theinvention being to furnish means for efficiently reinforcing thecenter-bearings of bolstore of either of the kinds named.

The invention consists in features of novelty hereinafter fullydescribed, and pointed out in the claims. I

Figure I is a side elevation of a body-bol- 2o ster having myreinforcing construction embodied therein. Fig. II is a side elevationof a truck-bolster having my reinforcing construction embodied therein.Fig. III is a longitudinal section taken on line III III, Fig.

2 5 I. Fig. IV is a longitudinal section taken on line IV IV, Fig. II.Fig. V is a transverse vertical section taken through the centralportions of a body-bolster and a truck-bolster assembled and each havingmy improvement embodied therein. Fig. VI is aview similar to Fig. V,showing the reinforcing construction heretofore in use and which myimprovement is designed to supplant.

In car-bolsters as heretofore constructed,

3 5 both of the body and truck type, the centerbearings of the bolstersproject beyond the king-pin posts to an extent that renders suchcenter-bearings liable to damage, owing to severe strain,unless somemeans is utilized to 4 sustain them. It has been the practice heretoforeto reinforce said center-bearings by casting brackets extending frompositions immediatel y above or below the center-bearings, according tothe type of bolster, to the kingpin posts, as I have illustrated in Fig.VI. These brackets have usually been placed at right angles to thelongitudinal center line of the bolsters. As a result of placing thereinforcing-brackets in the position stated a surplus of metal at thejunctions of the rein- 5o forcing-brackets with the adjacent othermembers of the bolster is produced, and this surplus of metal by reasonof its being of a greater body cools more gradually after a casting ismade, resulting in the metal checking or cracking at or near thejunction of the brackets and the adjacent posts or members. Furthermore,on account of the checking and cracking action due to the surplus metalat the points named the brackets are necessa- 6o rily made of slightthickness, and therefore have not protected the projecting portions of,the center-bearlngs to any material extent,

and it has been found necessary in some cases to provide two or morebrackets at each side of the bolster in an effort to more completelyreinforce the exposed portions of the centerbearings; but wherever thesebrackets are used, no matter what number of them there may be, there hasalways been a tendency to check and crack, as stated, thereby destroyingtheir efliciency.

My improvement consists in enlarging the king-posts of the bolstersadjacent to the center-bearings, so as to form swells at such loca- 7 5tion, which may be either cylindrical, rectangular, or any otherdesirable cross-section, according to diiferent designs or styles ofbolsters.

Referring now more particularly to the con- 0 structions illustrated inmy drawings, 1 designates a body-bolster, and 2 its center-bearing.

3 is the king-pin post of the bolster extending in a line common to thecentral portion of the center-bearing, but of smaller diameter 5 thansaid bearing, as is usual in cast-metal bolsters. At the base of theking-pin post 3 at each side of the bolster is a swell 4, that is ofshell form, as seen in Fig. V, and bu ges outwardly from the centralportion of the 9 king-pin post to the center-bearing to reinforce saidbearing and receive the direct force of any strain to which the bearingmay be subjected.

In the truck-bolster 1 (illustrated in Figs. II, IV, and V) thecenter-bearing 2' is situated above the bolster-body, as usual, and theking-pin post 3 extends upwardly toward said center-bearing and isformed with a swell i of similar shape to that, 4, of the body-bolsterwhich leads from the central portion of the king-pin post to a pointbeneath the overhanging center-bearing, where it serves to reinforce andsustain said bearing against the downward straining thrust to which itis subjected.

It will be observed that by enlarging the king-pin post into swell formadjacent to the center-bearin gs of the bolster there is provided auniform support for the projecting portions of said bearings throughoutsaid portions, and by having the bodies of the king-pin posts of theproper size to receive the king-pin ample support for the center-bearingis efficiently secured, and there being only a single thickness of allthe members of the bolster surplus of metal at all points is obviated,thereby completely overcoming the liability of the metal checking orcracking, to the detriment of the center-bearing-reinforcing members.

In Fig. VI, wherein the old type of reinforcement of the bolstercenter-bearings hereinbefore referred to is illustrated, A and Adesignate, respectively, body and truck bolsters having center-bearingsB and B and king-pin posts C and U of uniform diameter throughout theirlengths. D and D are the reinforcing-brackets of web form, to whichallusion has been made.

I claim as my invention 1. A car-bolster having a center-bearing juttingfrom the body thereof, a king-pin post, and reinforcing-swellsprojecting outwardly from the body of said king-pin post to saidcenter-bearing, substantially as set forth.

2. A car-bolster having a center-bearing jutting from the body thereof,a king-pin post, and swells of shell form projecting outwardly from thebody of said king-pin post to said center-bearing, substantially as setforth.

' JOHN GREEN.

In presence of E. S.- KNIGHT, BLANOHE HOGAN.

